The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  2  1  1  1  1  1  2  1  2  1  2  2  1  2  1  2  1  2  1  1  1  1
 0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  4  4  0  4  4  0  4  4  4  4  4  0  4  0  4  0  4  0  4  4  4  4  0  0  0  0  0
 0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  4  4  4  4  4  4  4  0  4  4  0  4  0  4  4  4  0  0  4  0  4  4  4  4  0  4  0  4  4  4  0  0  0  0
 0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  0  0  0  0  0  0  0  0  4  4  4  0  4  0  0  4  4  4  0  0  4  0  4  0  4  0  0  4  0  4  0  0  0  0  0  0  0
 0  0  0  0  4  0  0  0  0  0  0  0  0  0  4  4  4  0  0  0  4  4  4  4  0  0  0  0  0  0  4  0  4  4  0  4  4  4  4  4  4  0  0  0  0  4  0  0  4  4  0  0  0  0  0  0  0  0  0
 0  0  0  0  0  4  0  0  0  0  0  0  0  0  4  0  4  4  0  4  4  0  0  4  4  0  0  0  0  4  4  0  0  0  0  0  0  4  0  4  4  4  4  0  4  4  4  4  0  0  0  4  4  4  0  0  0  0  0
 0  0  0  0  0  0  4  0  0  0  0  0  0  0  4  4  0  4  4  0  4  0  4  0  4  0  0  0  4  4  4  4  4  0  0  4  0  0  0  0  0  0  4  0  0  4  4  0  4  4  4  4  4  0  0  0  0  0  0
 0  0  0  0  0  0  0  4  0  0  0  0  0  4  4  4  4  4  4  4  0  4  4  4  4  0  0  0  4  0  4  0  0  0  4  0  4  0  0  4  0  0  4  4  0  4  0  4  4  0  4  0  0  0  4  0  0  0  0
 0  0  0  0  0  0  0  0  4  0  0  0  0  4  0  0  4  4  0  0  4  4  4  0  4  0  0  4  0  0  0  4  0  0  0  4  4  4  0  0  0  4  4  4  0  0  4  4  4  4  4  0  4  0  0  0  0  0  0
 0  0  0  0  0  0  0  0  0  4  0  0  0  4  0  4  4  0  4  0  4  0  0  4  4  0  4  4  0  4  4  0  0  4  0  0  4  0  0  4  0  0  0  4  4  4  4  0  0  0  4  4  4  0  0  0  0  0  0
 0  0  0  0  0  0  0  0  0  0  4  0  0  4  0  4  0  4  0  4  4  0  4  4  0  0  4  0  0  4  0  4  0  0  0  0  4  4  4  4  4  0  0  0  4  4  0  0  0  0  4  0  4  4  4  0  0  0  0
 0  0  0  0  0  0  0  0  0  0  0  4  0  4  4  0  0  4  4  0  4  4  0  4  0  4  0  0  0  4  4  4  0  4  4  0  4  4  0  0  0  4  4  0  0  0  4  4  0  0  4  4  0  4  4  0  0  0  0
 0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  0  4  0  4  4  4  0  4  0  0  4  0  4  4  4  4  4  0  0  0  4  0  0  0  0  4  4  4  4  4  0  4  0  0  0  0  4  0  0  0  0  0  0  0

generates a code of length 59 over Z8 who´s minimum homogenous weight is 40.

Homogenous weight enumerator: w(x)=1x^0+224x^40+382x^44+722x^48+16x^50+1258x^52+576x^54+2620x^56+2016x^58+16384x^59+3442x^60+1344x^62+1759x^64+144x^66+987x^68+540x^72+248x^76+86x^80+18x^84+1x^100

The gray image is a code over GF(2) with n=236, k=15 and d=80.
This code was found by Heurico 1.16 in 62.6 seconds.